Manual DSLR

Actual pic -   all at 1/125 shutter speed  . using my new lens Canon EF 28mm f/1.8 USM.

with different settings and cropped

f1.8, ISO 400

f2.0 , ISO 400

f2.5, ISO 400

f2.8, ISO 400

so it get's sharper when stop down the aperture.... tapi when you do that, less light comes in.. makin it hard to capture indoor, lowlight pic .. so it's a balancing act really... unless tangkap pic outside with lots of light, you can even use a bigger f value (smaller aperture)... and pics will be  really sharp...  but I think I can manage with f2.8 indoors, especially with my lightscoop / lighttipper  (mak takde duit beli flash gun... yet)